M37 Engine Swap with M151 Engine

GT4U

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Illinois
So recently I started to dismantle my T245 in my truck, it runs, but has lots of blow-by and looks pretty sad. My question is could I put a turbo on a M151 engine and install it in my truck (the turbo is to try and make up the hp difference).
 

CGarbee

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I admit that I do not have the hp/torque curves for the engines...
However, having owned a few M37 and performed more than one engine swap (and having talked to a lot of folks over the years concerning their swaps), I think that you would be sorely disappointed in the performance of the M37 with a M151 engine (even if turbo'd) due to the lack of low end grunt...
 

GopherHill

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Thomaston, TX
All in all, the original 230 engine is not bad. It would be a lot less effort and expense to repair what you have. Engine swaps, while attractive in concept end up being money pits. M37s are not the best choice for a daily driver. I've done it but fuel was cheaper 40 years ago.
 

John Mc

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Monkton, VT
I admit that I do not have the hp/torque curves for the engines...
However, having owned a few M37 and performed more than one engine swap (and having talked to a lot of folks over the years concerning their swaps), I think that you would be sorely disappointed in the performance of the M37 with a M151 engine (even if turbo'd) due to the lack of low end grunt...
I have to agree. I never thought I would see a question from someone looking to swap a smaller engine into an M37.

I'm not sure where you are located, but Ken Holmes in Worcester, MA did a first rate job rebuilding my engine for about $2000. Between all the changes needed to make engine from the 151 work, plus the cost of buying and installing the turbo, you'd probably spend more than the cost of rebuilding the engine... and you'd still have a small engine that was being worked to death trying to haul around a 6000# truck.
 
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nattieleather

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Cleveland, OH
I agree with what other's have posted here. The M151 motor was designed as an industrial motor for Forklifts and Generators. It works well in the 151 because they aren't much bigger than a forklift. Load a 151 down with people gear and a loaded trailer and the peppy jeep becomes a tired dog. I know this from experience. I think putting that motor into the heavy M37s would slow it down more than it already is. And I don't know of any bolt on turbo for a 151 so you would have to be engineering that on your own. If you really don't want to rebuild the motor you have then look for a swap of a 318 or 360 Mopar. But as stated above engine swaps have their own set of issues and problems.
 

Mullaney

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I agree with what other's have posted here. The M151 motor was designed as an industrial motor for Forklifts and Generators. It works well in the 151 because they aren't much bigger than a forklift. Load a 151 down with people gear and a loaded trailer and the peppy jeep becomes a tired dog. I know this from experience. I think putting that motor into the heavy M37s would slow it down more than it already is. And I don't know of any bolt on turbo for a 151 so you would have to be engineering that on your own. If you really don't want to rebuild the motor you have then look for a swap of a 318 or 360 Mopar. But as stated above engine swaps have their own set of issues and problems.
.
Chevy small block 350 with a Turbo behind it fits too.
 

Johnbyrdgates

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I very successfully rebuilt my 230 10 years ago and it’s still going strong (in another guy‘s M37-mines electric now). I had a shop line bore and pickle-clean the block and I got the parts from vintage power wagon and built it in my barn.
 

glcaines

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I worked in an underground marble mine in North Georgia ~48-50 years ago and they had an M37 that had a Ford diesel tractor engine in it that was permissible to use underground. I don't know what model engine it was. When I drove the truck it had the original transmission and transfer case. It stayed in 1st gear low range as it was used almost 100% underground crawling over rocks and boulders. It had a significant amount of torque but it moved slow!
 
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